<PAGE>   1
                                                                      EXHIBIT 24


                               ISPAT INLAND INC.
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, as a director
and(or) officer of Ispat Inland Inc., a Delaware corporation, do hereby
nominate, constitute and appoint John M. Hanak, Marc R. Jeske, and Michael G.
Rippey, or any one or more of them, my true and lawful attorneys and agents to
do any and all acts and things and execute any and all instruments which said
attorneys and agents, or any of them, may deem necessary or advisable to enable
said Ispat Inland Inc. to comply with the Securities Exchange Act of 1934, as
amended, and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the preparation and filing of the Annual
Report on Form 10-K of said Ispat Inland Inc. for the fiscal year ended December
31, 1999, including specifically, but without limitation thereof, full power and
authority to sign my name as a director and(or) officer of said Ispat Inland
Inc. to said Annual Report on Form 10-K and any amendment thereto, hereby
ratifying and confirming all that said attorneys and agents, or any of them
shall do or cause to be done by virtue thereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 31st day of January, 2000.



                                                    /s/ Robert B. McKersie
                                                    ----------------------------
                                                        Robert B. McKersie
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                               ISPAT INLAND INC.
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, as a director
and(or) officer of Ispat Inland Inc., a Delaware corporation, do hereby
nominate, constitute and appoint John M. Hanak, Marc R. Jeske, and Michael G.
Rippey, or any one or more of them, my true and lawful attorneys and agents to
do any and all acts and things and execute any and all instruments which said
attorneys and agents, or any of them, may deem necessary or advisable to enable
said Ispat Inland Inc. to comply with the Securities Exchange Act of 1934, as
amended, and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the preparation and filing of the Annual
Report on Form 10-K of said Ispat Inland Inc. for the fiscal year ended December
31, 1999, including specifically, but without limitation thereof, full power and
authority to sign my name as a director and(or) officer of said Ispat Inland
Inc. to said Annual Report on Form 10-K and any amendment thereto, hereby
ratifying and confirming all that said attorneys and agents, or any of them
shall do or cause to be done by virtue thereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 31st day of January, 2000.


                                                    /s/ Lakshmi N. Mittal
                                                    ----------------------------
                                                        Lakshmi N. Mittal
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                               ISPAT INLAND INC.
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, as a director
and(or) officer of Ispat Inland Inc., a Delaware corporation, do hereby
nominate, constitute and appoint John M. Hanak, Marc R. Jeske, and Michael G.
Rippey, or any one or more of them, my true and lawful attorneys and agents to
do any and all acts and things and execute any and all instruments which said
attorneys and agents, or any of them, may deem necessary or advisable to enable
said Ispat Inland Inc. to comply with the Securities Exchange Act of 1934, as
amended, and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the preparation and filing of the Annual
Report on Form 10-K of said Ispat Inland Inc. for the fiscal year ended December
31, 1999, including specifically, but without limitation thereof, full power and
authority to sign my name as a director and(or) officer of said Ispat Inland
Inc. to said Annual Report on Form 10-K and any amendment thereto, hereby
ratifying and confirming all that said attorneys and agents, or any of them
shall do or cause to be done by virtue thereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 31st day of January, 2000.



                                                    /s/ Johannes Sittard
                                                    ----------------------------
                                                        Johannes Sittard
<PAGE>   4


                               ISPAT INLAND INC.
                               POWER OF ATTORNEY

     KNOW ALL MEN BY THESE PRESENTS, that I, the undersigned, as a director
and(or) officer of Ispat Inland Inc., a Delaware corporation, do hereby
nominate, constitute and appoint John M. Hanak, Marc R. Jeske, and Michael G.
Rippey, or any one or more of them, my true and lawful attorneys and agents to
do any and all acts and things and execute any and all instruments which said
attorneys and agents, or any of them, may deem necessary or advisable to enable
said Ispat Inland Inc. to comply with the Securities Exchange Act of 1934, as
amended, and any requirements of the Securities and Exchange Commission in
respect thereof, in connection with the preparation and filing of the Annual
Report on Form 10-K of said Ispat Inland Inc. for the fiscal year ended December
31, 1999, including specifically, but without limitation thereof, full power and
authority to sign my name as a director and(or) officer of said Ispat Inland
Inc. to said Annual Report on Form 10-K and any amendment thereto, hereby
ratifying and confirming all that said attorneys and agents, or any of them
shall do or cause to be done by virtue thereof.

IN WITNESS WHEREOF, I have hereunto set my hand this 31st day of January, 2000.



                                                    /s/ Dale E. Wiersbe
                                                    ----------------------------
                                                        Dale E. Wiersbe